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GETPID(2) | System Calls Manual | GETPID(2) |
NAME¶
getpid
,
getppid
—
get parent or calling process identification
LIBRARY¶
Standard C Library (libc, -lc)SYNOPSIS¶
#include
<sys/types.h>
#include
<unistd.h>
pid_t
getpid
(void);
pid_t
getppid
(void);
DESCRIPTION¶
Thegetpid
() system call returns the process
ID of the calling process. Though the ID is guaranteed to be unique, it should
NOT be used for constructing temporary file
names, for security reasons; see mkstemp(3)
instead.
The getppid
() system call returns the process
ID of the parent of the calling process.
ERRORS¶
Thegetpid
() and
getppid
() system calls are always
successful, and no return value is reserved to indicate an error.
SEE ALSO¶
fork(2), getpgrp(2), kill(2), setpgid(2), setsid(2), exec(3)STANDARDS¶
Thegetpid
() and
getppid
() system calls are expected to
conform to IEEE Std 1003.1-1990
(“POSIX.1”).
HISTORY¶
Thegetpid
() function appeared in
Version 7 AT&T UNIX.November 2, 2006 | Debian |